Packs/Racks/Baskets

Patented rack attachment system works on virtually any bicycle from full-suspension mountain bikes to commuters and everything in between. - Patented attachment system secures easily - Tough construction allows for variety of rugged riding uses - Silent and vibration free performance - Includes rails for mounting panniers - Works on the rear seat stays and front fork - Works with any type of frame material

The Back-Roller City is an economical starter version with clear features and plenty of space for bike touring. With its symmetrical design and slanted shape on both sides, this classic Ortlieb bag provides enough space for pedaling, while also allowing individual use on either the left or right side of the bike. The patented Ortlieb QL1 system allows fast and easy single-handed mounting and removal of the panniers, and is suitable for racks with a tube diameter up to 16 mm (hook inserts for diameters of 8 and 11mm are included). -Sold as a pair

Most of you don’t need the cargo capacity to land a helicopter on your rack. Sometimes, all you want to do is grab a sixer from the beer store on the way home or pick up a nice bouquet of flowers. For whatever the situation dictates, we offer the 8-Pack Rack. The 8-Pack Rack is a solid pedestal upon which you may rest a handlebar bag, grocery bag, minaudière, satchel…or whatever you use to carry your bowling ball around. The 8-Pack Rack attaches to most forks with mid-blade and crown eyelets. It uses stainless steel hardware (handily housed in a reusable Surly Tool Bag), and has the characteristic durability, versatility, and repairability all Surly products are known for. The 8-Pack Rack has lots of barrel braze-ons, so you can customize your cargo tie-downs…or just bolt on as many lights as you can. Rack Specifications: Color: Black or silver Weight Limit: 13.6kg (30lb) Finish: ED Coating + Powdercoat Rack Material: Tubular 4130 Chromoly Platform Dimensions: 270mm x 160mm

- Adventure ready saddle mounted removable drybag and holster system - Includes waterproof carry bag with air release valve to keep gear dry and compact - Bag easily slides in and out of holster without having to remove from bicycle - 15L measures 19.7

The Restrap Full Frame Bag allows you to easily increase the load out you carry for comfortable bikepacking and touring. The bags come in three sizes, designed to fit most standard frames and geometries. Two Aquaguard YKK zips on the drive side of the bag allow easy access to the top and bottom sections of the bag, with internal velcro dividers to separate the compartments. These dividers aid the structure of the bag when fully packed, but also fold away to allow use of the full internal space of the bag if needed. The non-drive-side of the bag contains a document pocket, useful for storing smaller items. The bag is made from durable, textured nylon outer and VX21 fabrics, with a wipeable lower section that means the bag is easy to keep clean when riding off-road or in adverse weather. Rubberized strapping provides extra grip to the frame and webbing straps, with easy-to-use cam locking buckles, keep the bag sitting securely and free of movement while riding. Handmade in our Yorkshire workshop, all bags are finished with the classic Restrap label, made from vegan-friendly PU. Weight - 275g / 322g / 368g (small/medium/large) Capacity - 6L / 7.5L / 9L (small/medium/large) - Body is made out of 1000D Textured Nylon & VX21 fabrics - 100% handmade in Yorkshire, England - Third-party online sales are strictly prohibited by the manufacturer All Restrap products carry a lifetime guarantee to be free of defects in materials and workmanship. We stand by our products and will cover the cost to repair or replace any defective product.

- Double bag, high-graded material - Main compartment with pull cord - Double side pocket - Topside with two bands for LED/straps/child's seat/spring clamp - Safety reflection - MIK system (pre-assembled MIK adpater plates snaps to any MIK rear carrier)

- Waterproof (IPX3) - Elastic cord ontop and mesh side pockets - Removable and adjustable shoulder strap - Waterproof lining with roll top - Fastening: 4 straps at bottom - Compatible: MIK system

Made with water- and dirt-resistant fabric and including a back-protector which is certified to EN 1621-2 level 1, the Backpack VPD Air Vest is perfect for shorter days on the trail, or for riders who want minimal storage with the addition of a back-protector. The unique twin-strap closure system provides a light and secure retention system, which also ensures that there is no restriction around the waist. A mixture of pockets offers easy access to tools or food. A specific mobile phone pocket and compatibility with hydration systems tops off a minimalist backpack with a great deal of flexibility and protection. - Light, ventilated back protector vest with pockets (630g incl backprotector) - Back protector, certified according to EN 1621-2 level 1 - Size medium (47cm long) - Twin-strap closure system - Tool pocket on the side for easy access - Designed to work with hydration system - up to 3 liters - Mobile phone pockets in the front and back and two mesh pockets for tools, tubes, food etc - Water/dirt-resistant fabric

This carbon Mukluk specific frame bag incorporates the best features of our classic Ranger frame bag. This frame bag is for the 2017-2021 year models of the Salsa carbon Mukluk. Your frame size correlates to the frame bag size; a small fits a small carbon Mukluk. If you have an aluminum Mukluk, we recommend the Ranger. Features: - Revelate exclusive RevX-PAC panels that are 2 times as abrasion resistant as standard VX material. - Zipstretch construction pairs a bomber, wetsuit style molded-tooth zipper with our exclusive stretch Cordura panels that reduce zipper stress when closing bag. - Industry leading #10 Molded tooth zippers with urethane coated tape are basically impervious to dirt and grit that destroy more commonly used water resistant coil zippers. - Exit port in main compartment for hydration tube or wires. - Zippered left side pocket on sizes SM-XL. - Bags feature one main compartment with vertical divider. - Expanding taper front section for increased volume at head tube. - Stretch mesh internal pocket. - Front top tube attachments accommodate top tube packs. Weight: - SM: 11 oz - MD: 12 oz - LG: 13 oz - XL: 15 oz Materials: - RevX-Pac Fabric: Dimension Polyant VX-21 with proprietary abrasion resistant finish; 1050 denier domestic ballistics nylon; 420 denier diamond ripstop lining; closed cell foam padded tube sections. Made in the USA with domestic and imported materials. These frame bags are manufactured and distributed by Revelate Designs and have no affiliation with Salsa Cycles. Salsa Cycles is a trademark of Quality Bicycle Products.

THE QUINTESSENTIAL PACK FOR CARRYING HEAVY LOADS OVER LONG DISTANCES. The Pack fits into the bike’s main triangle, providing a large space for bulky items — anything from cooking gear and tent poles, to heavy tools on longer expeditions and bikepacking trips. The resulting low centre of gravity is spread along a narrow, central plane, resulting in a Pack that has minimal effect on handling while offering a high volume of storage space. It’s constructed from a lightweight fabric, custom milled to Apidura’s specifications and welded together at the seams to create a watertight seal. Zippers with protected closures ensure that kit stays dry, even in a sustained downpour. A battery lead/hydration hose port is handy for charging devices or staying hydrated on the road. Features - Lightweight waterproof laminate, developed specifically for Apidura - Carbon-friendly attachment straps for a strong hold - Dual interior compartments, with removable internal divider - Interior storage pockets keep contents organised - Protected battery/hydration hose port - Reflective graphics for increased visibility Materials - The Expedition Full Frame Pack is cut from a three-layer laminate fabric that was developed specifically for Apidura. The material is lightweight, and is highly resistant to tears and abrasion. Notably, it’s welded together at the seams, creating a watertight seal that ensures complete waterproofing. Care - Hand wash, using a mild diluted soap if necessary. Afterwards, let it air dry. - Do not machine wash, machine dry, or iron.

- Waterproof (IPX3) - Elastic cord on top and mesh side pockets - Removable and adjustable shoulder strap - Waterproof lining with roll top - Fastening: 4 straps at bottom - Compatible: MIK system - Volume: 7L - Bag Dimensions in cm: 32 x 20 x 20

- Trunk bag, waterproof (IPX3) - Elastic cord ontop and mesh side pockets - Removable and adjustable shoulder strap - Waterproof lining with roll top - Fastening: 4 straps at bottom - Compatible with iRack, Racktime and Carrymore system - 7L

Surly Racks are well-thought-out, durable, expedition-worthy racks that work with most panniers. While their racks aren't limited solely to heavy duty touring, that is what they were designed for. When you're out on the road, the best option is to never ever have anything ever go wrong ever. Right? That's never a guarantee though; so having something that you can repair if it does break can be pretty clutch. Thus, the main bodies of Surly's front and rear racks are made from tubular CroMoly steel with stainless hardware. This means you can probably find someone out there that can torch it back into one piece in the rare instance things go south. The Front Rack is height adjustable and provides either a low or high pannier mounting position, which can be handy depending on terrain. When the ground gets rough, keep your gear high and dry. When the path is smooth and easy, you can load things low and keep everything balanced and stable, with the platform above the wheel providing yet more space for more stuff. It's worth mentioning they've redesigned the Front Rack hardware to be simpler to attach and more compatible with things like disc calipers and fenders. Surly also made attachment plates specifically for their Uni-Crown forks for yet more fork compatibility. This simpler design has fewer moving parts and costs less to manufacture; ergo, costs less for you to purchase. Surly's front rack WILL work with disc brakes on the Troll, Ogre, and Disc Trucker frames. It may take a bit of work to get clearance around the front caliper since the many different calipers out there are many different shapes. The new attachment plates will limit any DIY ingenuity you might need, but if you need to throw a washer or three behind the lower left bolt where the plate attaches to the fork dropout, that's not a big deal. As part of Surly's ongoing effort to make this planet last a little longer, they recently started shipping their racks with a small, reusable Surly Tool Bag that houses the rack struts and hardware. This switch helps eliminate the use of some polybags, thereby minimizing excess waste. Plus, you get a free tool bag out of the deal. Surly Front Rack will haul up to 32kg (70 lb) of well-secured, well-balanced gear over roadways and maintained off-road trails. Front Rack specifications: - Tubing diameter: 10mm - Platform dimensions: 230 x 170mm - Weight: 1382g

Load up and go! Salsa's Wanderlust HD Rear Rack is built from chromoly steel for real-world strength. A large deck teams up with multiple cross bars for securing panniers and other gear. To get you going, a mounting kit is included, and to help you stay visible, there's also a taillight mounting bracket.

The ORTLIEB Toptube Frame-Pack is the smart solution for all who want to use their frame's main triangle for storage space without having to do without their water bottle. The solution also works for those who have full-suspension mountain bikes with limited triangle space. With its 4-liter payload, the Toptube Frame-Pack provides plenty of space for heavy equipment such as tent poles, tools, and food supplies, while also helping to secure a low center for improved rising performance. And given that the bag and its zipper are waterproof, you can even cross rivers on your bikepacking tour without worrying about your stuff getting wet. The Frame-Pack attaches easily to your top tube and seat tube with the help of sturdy and highly adhesive Velcro straps. FURTHER FEATURES: - Ideal for all bikes with limited triangle space - Reflecting logo ADVICE: Suitable for carbon fiber frame.

The Elkhorn is a slender multi-tool of a rack. Stable and secure with 3-pack mounts on the uprights for your favorite cargo or bottle cages and more tie-down points on the deck than you could ever need. Front or rear compatible, the Elkhorn lets you feel the trail beneath you rather than the tail wag behind you. Old Man Mountain racks are the most versatile racks available. Capable of mounting to suspension forks, full-suspension mountain bikes, gravel bikes, road bikes, fat bikes, and even tri-bikes if that’s what you’re into. Tested and trusted in the most extreme environments on earth (we’re still trying to get NASA to take them to the moon). Our racks have helped riders traverse Iceland in bitter, cold winters, carried the gear of countless GDMBR riders, and circumnavigated the globe. The only remaining question is where will it go with you? Want to use our rack on a bike that isn’t made for racks? Want to swap your rack between multiple bikes? A Fit Kit is all you need. - The Elkhorn comes in two sizes; Short and Tall. - The Short is designed for 27.5 and 700c wheels. Fits tires up to 27.5 x 2.8" or 700c x 50mm. - The Tall is designed for maximum mud clearance and bikes with 29" tires. Fits tires up to 29 x 3.25". - Front or rear mountable. - Made from 6061 aluminum the racks are lightweight, stiff, and strong. - The rack is made from 1/2? (13mm) diameter tubing. - The deck measures 3.9" x 10.5" (100 mm x 266 mm) The deck includes slots for easily lashing gear in place and holes for mounting a light. - The Elkhorn comes standard, eyelet mount ready with optional fit kits available for thru-axle or QR mounting. - The Elkhorn has a load capacity of 25 lbs/11.34kg. - Rack weight (Short): 623 grams with 6" extenders. - Rack weight (Tall): 652 grams with 6" extenders. - Powder coated a sleek and refined shade of black. - If you want more precise fit information, the height from the mounting point to the deck is 390mm on the Short and 430mm on the tall. Be sure to leave room for debris and mud clearance. - Made in Taiwan. - Lifetime warranty

An updated Trunk Bag design for more than just e-bikes. Complete with a magnetic flap closure for easy one-handed opening and closing, and features the Top Lock mounting system for quick installation and removal from your rack's deck.

The Drafter 10L Women's Backpack meets all your mountain bike backpack needs, combining all the best technical bike pack features in a low-profile, women's-specific silhouette. Stay hydrated on the move with the 3-liter Hydrapak reservoir, located on the lumbar for a low center of gravity, with a high-flow bite valve. Stay cool and comfortable thanks to the shorter torso length, Air Suspension back panel, and S-shaped breathable shoulder straps. The organizer pocket features a home for all your tools, replacement parts, and necessities. Additional features include spine protection compatibility, external helmet carry, and deployable armor carry straps. - Women's-specific fit - 3L / 100 oz Dakine x Hydrapak 3D lumbar reservoir w/quick disconnect - High-flow Blaster bite valve w/shut-off and magnetic hose clip - AirLite Suspension back panel - Breathable ergonomic shoulder straps w/sunglasses quick stash - Separate cargo and hydration compartments - Internal ebike spare battery storage system - Padded, fleece sunglasses/phone pocket - Internal organizer pockets - Deployable external carry straps - Front quick stash & compression panel - Reflective panel and safety light attach - DK Impact Spine protector compatible (not included)

- Waterproof (IPX3) - Ajustable elatic buckle closure - Elastic mesh side pockets - Universal Bridge system - Mounting with 4 straps - Compatible with iRack, Carrymore and Racktime

The Adventure Race Bar Bag is the ideal handlebar storage solution for ultra-distance riding, audaxes, and races. The minimalist hardshell holster is constructed with a WX21 technical outer and durable nylon inner lining with Hypalon accents. The holster is shaped to optimize performance, whilst keeping weight to a minimum. Foam spacers and spring-loaded cam locks provide an easy and reliable attachment to your handlebars, whilst a reflective elastic cord retention strap aids stability around the head tube. A 100% waterproof 7L Dry Pack has been designed specifically for the Race Bar Bag, featuring a roll-top closure, reflective detailing, and stretch mesh side pockets that provide accessible storage for food, gloves, and other essentials on the go. Capacity - 7L Weight - 320g - A mini D-lock holster sits between the two compartments - 100% waterproof - Third-party online sales are strictly prohibited by the manufacturer All Restrap products carry a lifetime guarantee to be free of defects in materials and workmanship. We stand by our products and will cover the cost to repair or replace any defective product.

Do you like to take your bike shopping so as to avoid traffic jams and desperate searches for parking spots? And to get some good exercise and burn calories that you won’t have to count when you return for dinner? No matter whether you need to take a quick trip to the supermarket in the evening or to the farmer’s market on Saturday, your Velo-Shopper has a big hatch and an 18-liter payload. That’s enough for a lot of stuff! And you can conveniently open and close the magnetic snap buckle with one hand. Made of waterproof, abrasion-resistant nylon fabric, the Shopper can be attached to your bike rack with the proven Quick-Lock2.1 system. And then simply sling the Velo-Shopper over your shoulder with the detachable strap when you reach your destination. Go ahead and fill the Shopper to the brim because its stiffened inside construction will help to prevent crushing. FURTHER FEATURES: - zippered inside pocket with penholder and carabiner for keys - secure attachment to virtually all bike racks with tube diameters of 8mm to 16mm - large, high-luminosity 3M Scotchlite reflectors on the sides - sturdy base for anti-tilt stability

There’s a right waterproof backpack for everyone: The Velocity PS! The courier-style daypack Velocity is a favorite in the ORTLIEB collection. What's new: Handy details, new color concept and perfect if you want to do without the conventional tarp looks, because Velocity PS comes in a sustainable PVC-free material and you can go with the new PU coated nylon fabric. Designed with the ORTLIEB Messenger Bag in mind, this compact backpack is the perfect choice for students, or commuters, for every day, school, sports, or work. Velocity PS is sturdy and waterproof. Its trademark, the foam ventilated back, ensures carrying comfort along with breathability. Both the foam back and the ergonomic shoulder straps are improved for increased carrying comfort. The waist strap is adjustable or can be easily removed. Easy access roll-top closure with hook and loop guarantees 100% waterproofness and makes packing speedy and simple. In case the hook and loop fastener wears out after years of intensive use, simply return your pack to our ORTLIEB customer service and we will give your Velocity a second life. All components can be easily exchanged or repaired which makes Velocity a sustainable and lifelong companion. What’s new on the inside? All Velocity backpacks now feature an internal zippered organizer and a padded laptop sleeve fixed at the base and top taking computers (max. 15.4") and keeping them safe and dry. The lower edge protectors resist abrasion and wear. A bike light or helmet can be fixed to the back. Like all ORTLIEB products, Velocity PS is sustainably made in Germany. FURTHER FEATURES: - Carrying handle - Waist and sternum strap, adjustable and removable - Zippered organizer with laptop sleeve

The Frame-Pack RC Toptube is the solution for everyone who likes to have access to their water bottles while also carrying gear inside the bike frame triangle. This waterproof frame bag with roll closure is also ideal for full suspension mountain bikes, where space inside the frame's triangle is limited by the shocks. Part of ORTLIEB's bikepacking series, this bag with roll closure meets the IP64 standard for waterproofness, meaning your gear is fully protected from an involuntary bath. With its 4 liter volume, the Frame-Pack RC Toptube enables heavy equipment such as tent poles, tools or food to be carried within the frame triangle, maintaining the bike's low center of gravity. The customizable, sturdy, and strong Velcro fasteners enable simple and easy fastening and an uncomplicated installation. The frame pack RC Toptube is made in Germany and PVC-free. Together with the other products from the ORTLIEB bikepacking series, the frame pack RC Toptube forms the ideal equipment for an overnighter, a self-supported race, or your next big adventure. FEATURES: - Reflective logo on both sides of the bag

Ortlieb's far traveled classic model made of robust polyester fabric is designed for lowriders in the front or for the rear rack and is also suitable for children's bikes. With its QL2.1 system, it is quickly mounted and taken off the bike rack. - Classical pannier (pair) with roll closure - Can be used individually or as pairs for the rear or lowrider - Sides of PS490 nylon material, front and back of PD620 - QL2.1 system for racks up to 16 mm - 20 mm hook available as separate accessory (e.g. for e-bikes) - Including reduction pieces for tube diameters 8, 10, and 12 mm; with anti-scratch function reducing abrasions on rack - Top QL hooks and lower sliding hook adjustable without requiring any tools - Lower hook rail made of two-component "hard-soft" synthetic reduces abrasions on carrier - Including integrated inner pocket and shoulder strap - Symmetrical shape allows use on right or left side - Can be combined on the rack with Ortlieb Rack-Pack size 24L or 31L - Simultaneous use of Ortlieb Travel-Biker possible - Highly reflective Scotchlite reflector - Ideal for use on children's/youth bicycles - Easy to clean inside

If your idea of a good time includes shredding singletrack or ripping rougher terrain on bikepacking adventures, the Olliepack Seat Bag is your new back-of-bike best friend! A great addition to any off-road rig, the Olliepack Seat Bag offers a straightforward, roll-top closure providing added water resistance as well as variable capacity to suit your carrying needs throughout the roughest of rides. No rack or hardware needed to lock this bag tight under the saddle and out of the way enough to get your bum behind the saddle while negotiating steep descents or tight trails. Combine the Olliepack Seat Bag with a Zeitgeist Pack, Hold Fast Half Frame Bag, a couple of Gibby Stem Bags and the Moxie Top Tube Bag for a perfect, lightweight rack free overnight setup. This seat bag stays snug and stable on the most rugged terrain with the trusty help of secure saddle rail buckle straps and a wide, grippy seat post velcro strap. Close the bag and compress your gear by rolling and cinching the main compartment. Once the main hatch is closed, an external power mesh stash-pocket allows for quick storage of a lightweight layer, wrappers and more. Reflective detailing on the compression straps keeps you visible on the road. The Olliepack Seat Bag is made from recycled polyester and contains roughly 10 recycled bottles rescued from polluted rivers. Features: - Roll-top closure - Side compression buckles - Center compression strap with reflective tape - One Wrap velcro seat post strap - Saddle rail buckle straps - Made in Surabaya, Indonesia and Seattle, WA out of recycled materials Dimensions: - Measurements: Max (with 3 rolls to close): 6" wide at top, 2" wide at bottom, 5.5" deep, 20" tall - Capacity: 6 Liters max - Weight: 11 oz

A secure pack to get all of your gear to the next ride The Transition Pack is a true kit hauler. Its large storage capacity means you can fit in multiple full kits, including room for a helmet, guards and footwear. But it's not just ride gear. The fleece lined pocket keeps your valuables safe, while the padded sleeve is like a pillow for your laptop. Perfectly sized to fit in most airline overhead compartments, this is the perfect bag for riders on the move. - Fleece lined pocket for keeping valuables safe - Padded laptop sleeve for travel convenience - Ripstop nylon construction to handle the demands of traveling - Compression mesh stash pockets for on-the-go-storage - DIMENSIONS - Capacity: 45 L

- Classic constructeur style racks made of polished stainless steel - Mounts to hub axle or braze-ons for universal fitment. - Front mini-Rack mounts to mid-blade fork eyelets, or uses included p-clamps - Front racks have lots of braze-ons for mounting accessories/Lights - Maximum height is 40cm (Does not apply to mini rack) - Includes mounting hardware

The Ardea Pack is a bicycle handlebar bag that converts into a kick-ass hip pack. The transformation is as simple as it is genius. Add to the Adrea Pack's 2.5 Liter capacity by attaching the Sidekick Stem Pouch and/or the Rando Pocket to the hip stabilizers of the Ardea when it's in hip-pack mode. The Ardea Pack is an excellent accessory for mountain biking, gravel rides and tooling around town. The Ardea Pack is made out of Challenge ECOPAK 100% recycled polyester and contains roughly 8 plastic bottles rescued from ocean beaches. The Ardea Pack is in equal measure a hip pack and a bicycle handlebar bag. Mounted at the bars of your bicycle, the hip pack straps stow discreetly out of sight. The bag secures to the bars with two camlock straps. No racks necessary. The 2.5-liter pack was built for your essentials, like a fly fishing kit, sunscreen, maps or snacks. There are two exterior webbing straps on the base of the Ardea Pack to securely carry either your windbreaker or packable fly rod. Features: - 400 D Packcloth Lining throughout the body - Breathable spacer mesh backing - YKK water resist exterior zippers - Convertible hip pack design - Integrates with the Sidekick Stem Pouch and the Rando Pocket - Internal and External organizing pockets - Exterior front zipper pocket - Camlock buckles for fast attachment Dimensions: - Measurements: 10" w x 6" h x 2.5" d - Capacity: 2.5 Liters - Weight: 10 oz - Waist Belt Sizing: 26" to 51"

The Racing Saddle Pack is the first rear pack dedicated to ultra-distance competition and audax. Featuring a sleek design with a compact capacity, the Pack is ideal for storing light, compressible items over vast distances. Constructed from an ultralight, waterproof laminate developed for Apidura. The Pack weighs less than 210g and securely fastens with a sturdy three-point attachment system. It’s designed to fit ergonomically under the saddle, minimizing sway and reducing drag. Light attachment points are laser-cut into the fabric, increasing rider safety without adding unnecessary weight. A high-contrast reflective feature is specially designed to enhance visibility in all light conditions. A roll-top closure provides adjustable capacity, and tailored webbing, straps and buckles shed extra weight, while ensuring the simplest setup for ease of use, when every second matters. Materials The Racing Saddle Pack is made from Hexalon, a bespoke laminated fabric developed specifically for Apidura. Designed to fit the demands of ultra-distance competition and audax, the material is waterproof and lightweight, with strong tear and abrasion resistance. The attachment points are reinforced with Hypalon, a durable rubberized nylon that provides extra protection against friction and puncture. For the fastening system, we’ve chosen Woojin buckles for strength and reliability.

Surly's burly line of tubular chromoly steel racks have been used on expeditions all over this planet for years.This Surly Rear Disc Rack is made of tubular chromoly steel and is specifically designed to fit frames with seatstay-mounted disc brakes like the Straggler (650B and 700c), Krampus, and Karate Monkey. - Tubular chromoly rack, stainless-steel hardware - Height-adjustable to accommodate 26-29" wheels - Hardware housed in reusable Surly Tool Bag